This stuff works great but when using a heat gun it melts every brush I've used ! Maybe I can heat the part with the Heatgun and then spread the rpm with a warm hairdryer.
I heat the item that I am using it on by first warming in the sun. I then warm further with a heat gun. Only then do I place my brush into the RPM container loading it with the product. Then just like applying paint spread it about. Not my brush, nor any animals were hurt doing in this way.
Just did a new master cylinder last month,,,so far looks fine. Will say that using the product you might experience a slight dulling of the native metallic sheen of the original cast iron. Has been my experience, but overall a better outcome than anything else I've used.
